242728279 has 2 divisors, whose sum is σ = 242728280. Its totient is φ = 242728278.

The previous prime is 242728273. The next prime is 242728303. The reversal of 242728279 is 972827242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242728279 - 2⁵ = 242728247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242728273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121364139 + 121364140.

It is an arithmetic number, because the mean of its divisors is an integer number (121364140).

Almost surely, 2^242728279 is an apocalyptic number.

242728279 is a deficient number, since it is larger than the sum of its proper divisors (1).

242728279 is an equidigital number, since it uses as much as digits as its factorization.

242728279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 242728279 is about 15579.7393752270. The cubic root of 242728279 is about 623.7924665633.

The spelling of 242728279 in words is "two hundred forty-two million, seven hundred twenty-eight thousand, two hundred seventy-nine".